Seraphin, Silver Guardian

Flying, Lifelink, Indestructible.
{t}: {w}{w}{w}
Seraphin, Silver Guardian's power and resilience is equal to his Devotion to white. When this creature enters or leaves the battlefield, destroy all non-angel creatures; they cannot be regenerated. Whenever a creature your opponent controls dies, exile it instead. At the beginning of your upkeep you may return target creature with mana value 3 or less from your graveyard to the battlefield. It gains +1/+1 flying and becomes an angel in addition to its oth